40
2
.
5
FUNDAMENTALS OF ELECTRICAL ENGINEERING
L

P
4

2
RATIONALE
For a diploma holder
,
it becomes imperative to know the fundamentals of the s
ubject in
order to grasp the knowledge of the field. This subject will provide acquaintance with
various terms knowledge of fundamental concepts of electricity, magnetism and various
principles related to it.
DETAILED CONTENTS
1.
(a)
Application and Advant
ages o
f Electrical Energy
(8
Hrs)
Different forms of energy
Advantages of electrical energy
Uses of electrical energy
(b)
Basic Electrical Quantities
Basic concept of charge, current, voltage, resistance, power, energy and
their units
Conversion of units of work, power and energy from one form to another
2.
DC Circuits
(8 Hrs)
2.1
Ohm’s law, resistances in series and parallel
2.2
Kirchhoff’s laws and their applications in solving electrical
network
problems
3.
Batteries
(
6
Hrs)
3.1
Basic idea about primary and secondary cells
3.2
Working principle, construction and applications of Lead acid, Nickel
Cadmium and Silver Oxide Cells
3.3
Charging m
ethods used for lead acid accumulator
3.4
Care and maintenance of a lead acid battery
4.
Magnetism and Electromagnetism:
(7 Hrs)
4.1
Introduction to electromagnetism, Magnetic field around a straight current
carrying conductor
and a solenoid and methods to find its direction, force
between two parallel current carrying conductors.
4.2
Force on a conductor placed in the magnetic field
41
4.3
Series magnetic circuits, simple problems
4.4
Concept of hyteresis, loop and hysteresis loss.
5.
Electromagnetic Induction:
(8 Hrs)
5.1.
Faraday's Laws of electromagnetic induction
5.2.
Lenz's law
5.3.
Fleming's Right and Left Hand Rule
5.4.
Principle of self and mutual induction
5.5.
Principle of self and mutually induced e.m.f.
and simple problems
5.6.
Inductances in series and parallel
5.7.
Energy stored in a magnetic field
5.8.
Concept of eddy currents, eddy current loss
6.
AC Fundament
als
(7
Hrs)
6.1.
Concept of a.c. generation (single phase and three ph
ase)
6.2.
Difference between a.c and d.c
6.3.
Concept of alternating current and voltage, equation of instantaneous values,
average value, r.m.s value, form factor, power factor etc.
6.4.
Concept of phasor and phase difference.
6.5.
Representation of alternating sinusoidal
quantities by vectors
6.6.
Phasor algebra (addition, subtraction, multiplication and division of complex
quantities)
7.
AC Circuits
(12 Hrs)
7.1.
AC through pure resistance, inductance and capacitance
7.2.
Alternating voltage applied to RL,RC and RLC series
and parallel circuits
(impedance triangle, phasor diagram and their solutions)
7.3.
Concept of susceptance, conductance and admittance
7.4.
J

notation and its application in solving problems in ac circuits
7.5.
Power in pure resistance, inductance, capacitance and seri
es RL, RC, RLC
circuits
7.6.
Active and reactive components of current and their significance
7.7.
Power factor and its practical significance
8.
Poly

Phase systems
(8 Hrs)
8.1
Advantages of 3 phase over single phase system
8.2
Star and delta connections ( derive r
elationship between phase and line
voltages, phase and line currents in star delta connections
8.3
Power in 3 phase circuits and measurement by two wattmeter method
8.4
Measurement of power and power factor of a 3

phase load by two wattmeter
method using balanced/
unbalanced load.
42
LIST OF PRACTICALS
1.
(a)
Determination of voltage

current relationship in a dc circuit under specific
physical conditions and to draw conclusions (to verify ohm’s law)
(b)
Filament lamp
measure the resistance of a cold lamp fi
lament with the help of
calculations.
measure the current drawn by the lamp at different voltages from zero to
220 volts
and the resistance of lamp at different voltages, plot a graph
between current and
voltage
2.
(a)
To verify that R
t
= R
1
+R
2
+…. where
R
1,
R
2
etc. are resistances connected
in
series
(b)
To verify
1
1
1
1

=

+

+






+

Rt
R
1
R
2
R
m
Where R
1,
R
2
etc. are resistances connected in parallel
3.
Verification of Kirchhoff’s current and vol
tage laws applied to DC circuits
a)
to construct a circuit arrangement consisting of resistances in series, parallel
combination
b)
identification of node points in the circuit
c)
to see that algebraic sum of currents at node point is zero
d)
to see
that algebraic sum of emfs and voltage drops in a closed loop is zero
4
.
To find ratio of inductance values of a coil having air /iron core respectively and to
see the effect of introduction of a magnetic core on coil inductance
5
.
To construct an RL an
d RC circuit and to measure
a)
impedance of the circuit
b)
phase angle between voltage and current
c)
construct impedance triangle
6
.
Measurement of power and power factor of a single phase RLC circuit. To calculate
KVA and KVAR
7
. Measuremen
t of power and power factor of a 3

phase circuit by using 2

wattmeter
method using induction motor as a load and to calculate KVA and KVAR
Note: The results should be verified analytically also.
43
INSTRUCTIONAL STRATEGY
Basic electrical engineering bei
ng a fundamental subject need to be handled very carefully
and in a manner such that students develop clear understanding of principles and concepts
and develop skill in their application in solving related problems. Teacher may lay emphasis
on laboratory
experiments and give lot of tutorial work to students in order to giver them an
opportunity in mastering the basics in solving related problems
RECOMMENDED BOOKS
1.
Fundamentals of Electrical Engineering by Sahdev, Uneek Publication, Jalandhar
2.
Basic Elec
trical Engineering by PS Dhogal, Tata McGraw Hill Education Pvt. Ltd.,
New Delhi
3.
Electrical Science by VK Mehta, S Chand and Co., New Delhi
4.
Electrical Engineering by DR Arora, Ishan Publications, Ambala
5.
Electrical Technology by JB Gupta, SK Kataria and So
ns, New Delhi
6.
Electrical Technology by BL Theraja, S Chand & Co., New Delhi
7.
Electrical Science by S. Chandhni, R Chakrabarti and PK Chattopadhyay. Narosa
Publishing House Pvt. Ltd., New Delhi
8.
Basic Electrical Engineering by Mool Singh, Galgotia Publicati
on Pvt. Ltd., New
Delhi
9.
Principles of Electrical Engineering by BR Gupta, S Chand & Co., New Delhi
10.
Handbook of Electrical Engineering by SL Bhatia, Khanna Publishers, New Delhi
SUGGESTED DISTRIBUTION OF MARKS
Sr. No
Time Allotted
(Hrs)
Mar
ks Allocation (%)
1
08
10
2
08
15
3
0
6
05
4
07
10
5
08
15
6
07
15
7
12
15
8
08
15
Total
64
100
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